Exercises. Part 6

• Write a short explanatory comment for the following shell script:

$ find . -name '*.dat' -print | wc -l | sort -n

• The -v flag to grep inverts pattern matching, so that only lines which do not match the pattern are printed. Given that, which of the following commands will find all files in data/chem/pdb whose names end in ose.dat (e.g., sucrose.dat or maltose.dat), but do not contain the string temp?

1. $ find data/chem/pdb -name '*.pdb' -print | grep ose | grep -v temp
2. $ find data/chem/pdb -name ose.pdb -print | grep -v temp
3. $ grep -v temp $(find data/chem/pdb -name '*ose.pdb' -print)
4. None of the above.